John Walter da Silva QSM (11 June 1934 – 8 April 2021) was a New Zealand wrestler and boxer.

[2] He represented New Zealand in wrestling at the 1956 Olympics and at the 1958 British Empire and Commonwealth Games.

[5] Da Silva set up a geographically isolated boot camp, the Te Whakapakari Youth Programme, at Aotea on Great Barrier Island in 1977.

The aim was to de-program young Māori from drug abuse and give them skills and confidence.

[6] Survivors reported physical and sexual abuse from supervisors and da Silva.